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Break line detecting device

A technology of disconnection detection and detector, applied in the direction of measuring device, measuring electricity, electric winding test, etc., can solve problems such as difficulty

Inactive Publication Date: 2018-04-06
NABLESCO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is not easy to detect a disconnection of the wiring connected to the solenoid coil while the current is flowing through the solenoid coil.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0049] figure 1 It is a circuit diagram of the disconnection detecting device 1 according to the first embodiment of the present invention. figure 1 The disconnection detection device 1 includes a drive transistor (first switching element) 2 , a first disconnection detection circuit 3 , and a second disconnection detection circuit 4 .

[0050] The driving transistor 2 switches and controls whether to flow current to the solenoid coil L of the solenoid valve. figure 1 The drive transistor 2 is an example of an NPN bipolar transistor, but may also be composed of a PNP bipolar transistor or a FET (Field Effect Transistor: Field Effect Transistor). figure 1 The excitation transistor 2 is turned on when the base voltage is high, and current flows through the solenoid coil L. Opening and closing of the solenoid valve is controlled by switching whether or not current is passed to the solenoid coil L.

[0051] The first disconnection detection circuit 3 detects a disconnection ...

no. 2 approach

[0078] When a plurality of solenoid valves are mounted on a ship or the like, the number of wires connected to the solenoid coil L of each solenoid valve also increases, and there is a risk that disconnection detection may become complicated. In the second embodiment described below, disconnection detection of a plurality of wirings is efficiently performed.

[0079] Figure 4 It is a circuit diagram of the disconnection detecting device 1 based on the second embodiment. Figure 4 An example is shown in which the disconnection detection of the wiring connected to the solenoid coil L of two solenoid valves is performed, but the number of solenoid valves may be three or more, Figure 4 The circuit can be applied to disconnection detection of any number of wires.

[0080] Figure 4 The wire disconnection detection device 1 includes a first wire disconnection detection unit 21 for detecting a wire disconnection connected to the solenoid coil L of the first solenoid valve, and a...

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Abstract

The invention provides a break line detecting device detecting a break line of a wire connected with a solenoid coil quickly and accurately. The break line detecting device 1 is provided with a firstswitch element 2 for switching control of whether to let current flow to the solenoid coil of an electromagnetic valve or not; a first break line detecting circuit 3 detecting the break line of the wire connected to the solenoid coil when the first switch element is in connection; and a second break line detecting circuit 4 detecting the break line of the wire when the first switch element is in disconnection.

Description

technical field [0001] The present invention relates to a wire break detection device which detects a wire break of a wiring connected to a solenoid coil of an electromagnetic valve. Background technique [0002] Solenoid valves are widely used for the purpose of switching and controlling the flow rate supplied to a coil of an engine, steering of a ship, and the like. The solenoid valve switches and controls opening and closing by whether or not current is passed to the solenoid coil. The circuit for controlling whether to flow current to the solenoid coil of the solenoid valve for ships is sometimes arranged at a place far from the solenoid valve for the purpose of avoiding noise, securing the installation place of the solenoid valve, and the like. In this case, wiring for electrically connecting the solenoid coil of the solenoid valve and the circuit for controlling the solenoid coil must be led into the ship. [0003] The longer the overall length of the wiring, the hig...

Claims

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Application Information

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IPC IPC(8): G01R31/02
CPCG01R31/50G01R31/72
Inventor 冈本武史中尾健志
Owner NABLESCO CORP
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